Anterior capsule stability in eyes with intraocular lenses made of poly(methyl methacrylate), silicone, and AcrySof.
OBJECTIVE
To ascertain whether the movement of the anterior capsule is different with intraocular lenses (IOLs) made from different materials.


METHODS
Department of Ophthalmology, St. Thomas' Hospital, London, United Kingdom.


METHODS
Ninety patients had standardized extracapsular cataract extraction, continuous curvilinear capsulorhexis (CCC), and confirmed in-the-bag IOL placement performed by the same surgeon. Patients were randomized to receive a three-piece, 6.0 mm IOL made of poly(methyl methacrylate) (PMMA), silicone, or AcrySof, all with PMMA haptics, and received standardized postoperative medication. Except for material, the IOLs were of the same design. On days 7, 30, 90, 180, and 360, digitized retroillumination images were taken of the IOL. The movement of the anterior capsule between each visit was analyzed.


RESULTS
The amount of anterior capsule movement was significantly less in the AcrySof lens group than in the PMMA or silicone lens groups in the first year after surgery (P = .0001).


CONCLUSIONS
The AcrySof lens with PMMA haptics produced significantly less anterior capsule movement than PMMA or silicone lenses and thus is likely to cause less IOL decentration and capsular phimosis.
Ursell
P G
PG
Department of Ophthalmology, St. Thomas' Hospital, London, United Kingdom.
Spalton
D J
DJ
Pande
M V
MV
D000179:Acrylates; D001672:Biocompatible Materials; D019923:Capsulorhexis; D006801:Humans; D007903:Lens Capsule, Crystalline / Q000502:physiology*; D007910:Lenses, Intraocular; D008875:Middle Aged; D009068:Movement; D019904:Polymethyl Methacrylate; D011446:Prospective Studies; D012826:Silicone Elastomers
D000179:Acrylates; D001672:Biocompatible Materials; D012826:Silicone Elastomers; D019904:Polymethyl Methacrylate